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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>

</body>
<script>
    // 输出0,5,10,15，....，50这些数，（扩展：统计这些数有多少个）

    // 申明统计个数
    let count = 0;
    for (let i = 0; i <= 50; i += 5) {
        console.log(i);
        count++;
    }

    // 控制台打印统计个数
    console.log(`统计：共${count}个`);
</script>

</html>